de.tobiasbruns.fs20.sender.FS20SenderService.java Source code

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Here is the source code for de.tobiasbruns.fs20.sender.FS20SenderService.java

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/*
 * Copyright 2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package de.tobiasbruns.fs20.sender;

import javax.usb.UsbDevice;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import de.tobiasbruns.fs20.sender.FS20Result.ResultCode;

/**
 * created: 05.01.2017
 *
 * @author Tobias Bruns
 */
@Service
public class FS20SenderService {

    static final short VENDOR_ID = 0x18ef;
    static final short PRODUCT_ID = (short) 0xe015;

    @Autowired
    private UsbService usbService;

    public FS20Result executeRequest(FS20Request request) {
        UsbDevice device = findSender();
        byte[] resultData = usbService.sendAndRecv(device, request.toBytes());
        return new FS20Result(ResultCode.byCode(resultData[3]), resultData[4]);
    }

    public String getFirmwareVersion() {
        FS20Result result = executeRequest(new FirmwareRequest());
        char[] versionArray = Integer.toHexString(result.getPayload() & 0xffff).toCharArray();
        return versionArray[0] + (versionArray.length > 1 ? "." + versionArray[1] : "");
    }

    public void checkResult(FS20Result result) {
        if (result.getResultCode().isError())
            throw new RuntimeException("Error Received: " + result.getResultCode());
    }

    private UsbDevice findSender() {
        return usbService.findDevice(VENDOR_ID, PRODUCT_ID);
    }

}